<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<title>主页面</title>
<style type="text/css">
	#top{
		height: 50px;
		width: 1200px;
		margin: 0 auto;
	}
	#center{
		height:800px;
		width: 1200px;
		margin: 0 auto;
	}
	#footer{
		height: 50px;
		width: 1200px;
		margin: 0 auto;
	}
	#back {
	height: 100%;
	width: 100%;
	/* background-image:url("image/a2.jpg"); */
	background-repeat: round;
	background-origin: content-box;
	z-index: 1;
   }
   #back2{
      margin:  auto;
      position: absolute;
      z-index: 2;
      top: 3%;
	  left: 18%;
	  background-color:  	SkyBlue;
   }
   img
{
opacity:0.8;
filter:alpha(opacity=40); 
}
</style>
</head>
<body>
<div id="back">
    <img alt="" src="image/a4.jpg" style="width: 100%; height: 1000px;">
    <div id="back2">
	<div id="top">
		<jsp:include page="top.jsp"></jsp:include>
	</div>
	<div id="center">
		<div id="left">
			<jsp:include page="left.jsp"></jsp:include>
		</div>
		<div id="main">
			<iframe name="mainFrame" src="" frameborder="0" width="80%"
					height="500px"></iframe>
			
		</div>
		<div id="right"></div>
	</div>
	<div id="footer">
		<jsp:include page="footer.jsp"></jsp:include>
	</div>
	</div>
</div>	
</body>
</html>